Question

An irregularly shaped body of mass 1.55 kg is mounted on an axle
located 29.0 cm from the center of gravity of the body. The body
oscillates as a pendulum with a period of 3.10 s and an amplitude
of 0.100 rad. Find the body's moment of inertia about this
axis.

The ANSWER for THIS PROBLEM is 1.07 kg m^2 ... HOW DO I FIND THIS
EXACT ANSWER